Hint: he's not a big believer in it. Hint II: some of those bracketed phrases are really swear words.

“Take all that clubhouse [stuff] and all that, throw it out the window.
Every writer in the country has been writing about that [nonsense] for
years. Chemistry don’t mean [anything]. He’s up here because he’s good.
That don’t mean [a hill of beans]. They got good chemistry because their
team is improved, they got a real good team, they got guys knocking in
runs, they got a catcher hitting .336, they got a phenom pitcher they
just brought up. That’s why they’re happy.”

— Jim Leyland — whose every bracketed-phrase was likely an s-bomb — on the value of team chemistry.